Malicious PDF — malware analysis report

Static analysis result for SHA-256 758314782b179a48…

MALICIOUS

PDF

41.3 KB Created: 2020-08-23 06:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 133ba2b3a99ac6828fca5d020e3b4df8 SHA-1: 36310114ad453cfa275326de7591f1e819470d09 SHA-256: 758314782b179a488915d469e92b425348beeda6ca8b95249216594e9c9559f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=vaste+jaan+bhi+du+song+video', which is flagged as malicious. This suggests the document is part of an SEO spam or phishing campaign designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=vaste+jaan+bhi+du+song+video
    • http://files.voodoocosmetics.org/uploads/1/3/1/6/131636965/6017735.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/6178/6262/files/antoine_equation.pdf
    • https://cdn.shopify.com/s/files/1/0432/6545/8336/files/lunebofuxedexezu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/80186444696.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/tujosinulerizole.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0611/files/torefedew.pdf
    • https://cdn.shopify.com/s/files/1/0436/2331/7662/files/tiwalivunuwipab.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/vopewaxatabuwavuxapibudu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/76844586748.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/fujunad.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/business_plan_pro_trial_free.pdf
    • https://cdn.shopify.com/s/files/1/0446/1690/8963/files/idsa_endocarditis_prophylaxis_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/31914018817.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004adc.bin
065c808ec9f0757fe8371c8729a8695f00703e5f8661d0c28a374e036ba64877		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ADC 5080 bytes
font_01_sfnt_off00005c1c.bin
37d99f571df0dd73bc7ca809a7fa8f57b1dbc713e3244fdb8f5ed789621ff68f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1C 14404 bytes
font_02_sfnt_off000088a5.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88A5 4324 bytes

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